setSecurity not working as expected

Just spend a few hours looking into this. If you'd put setSecurity after setServices it would have worked I believe, although there are some other issues.

• passkey:"123456" isn't valid in setServices
  
• If you specify lesc: true but then don't have it in setSecurity then it'll bond but you still won't be able to access
  
• I don't believe the passkey is good enough for lesc - at least pairing with then enabled fails
  
  

So if you do the following, you should be good:

NRF.setServices({
  0xabcd : {
    0xAB40 : {
      value : "Hello",
      maxLen : 50,
      notify: true,
      readable: true,
      writable: true,
    },
    0xAB41 : {
      value : "Hello",
      maxLen : 50,
      notify: true,
      readable: true,
      writable: true,
      security: {
        read: {
          encrypted: true,
          mitm: true
        }, write: {
          encrypted: true,
          mitm: true
        }
      },
      onWrite : function(evt) { // optional
        console.log("Written ", evt.data); // an ArrayBuffer
      }
    }
  }
}, {advertise: [ 0xabcd ]});
NRF.setSecurity({passkey:"123456", mitm:1, display:1});
NRF.on('disconnect',x=>print('disconnect',x));
NRF.on('connect',x=>print('connect',x));